Study on quality standard of Sophora flavescens root extract Screening of virulence-attenuated strains for Fusarium oxysporum f. sp. cucumerinum after treatment with parsley fresh root extract Inhibitory effect of Trifolium pratense on the growth of Lactuca sativa seedlings Allelopathy of grape root aqueous extracts. Allelopathic effects of extracts from fibrous roots of Coptis chinensis on two leguminous species Study on antimicrobial assay of root extract of allelopathic Helianthus annuus An Orthogonal Method for Comparing Extracting Techniqucs of Licorice Root Extract